Shortly before the start of WW2, renowned British big-game hunter Alan Thorndike, vacationing in Bavaria, has Hitler in his gun sight. He is captured, beaten, left for dead, and escapes back to London where he is hounded by Nazi agents and aided by a young woman.
Vaner

Ludwig Stössel
Doctor

Heather Thatcher
Lady Alice Risborough

Frederick Worlock
Lord Gerald Risborough